2007

6.5

1999

8.5

2008

8.3

2003

7.4

2005

8.8

2004

7.3

2001

7.6

2021

8.4

2012

8.6

2012

8.3

2020

8.2

2020

6.5

1986

6.1

2002

8.4

2009

7.9

2012

7.7

2011

8.7

2013

7.8

2011

7.2

2010

7.4